Strip for terrazzo floors and like structures



Dec. 2, 1930. G. P. GRANELL 1,783,783

STRIP FOR TERRAZ ZO FLOORS AND LIKE STRUCTURES Filed Nov. 21, 1928 2. I T 17 WZ%W Y IIlIIIlI/llllll.

Ill 7% mum 1 i I/bgENTQR I w; ORNEY Patented Dec. 2, 1930 GEORGE I. GRANELL, OF LONG ISLAND CITY, NEW YORK STRIP FOR TERBAZZO FLOORS AND LIKE STRUCTURES Application filed November 81, 1928. Serial no. 320,805.

My invention relates to metal strips used in terrazzo floors and like structures.

The principal object is to provide a strip having improved bonding formations or devices.

In a preferred form these bonding or interlocking formations are ton ues punched from the integral metal of tie strip and rolled or curled so that their free ends abut a ainst the strip face, forming rings or eyes w ich are very stiff and rigid, and interlock =proper1- with the concrete or other plastic body in which they are inserted, and prevent displacement of the strip in any direction.

When desired, nails may be passed throu h these eye formations and driven intot e under base, such as a wood floor on which the terrazzo floor is laid, thus securely holding the strip against displacement while the terrazzo work is completed.

Also in some-cases separate bonding or interlockin devices,"of the general charac- 5 ter of stap es, may be inserted in the stripeyes, to provide an additional bond, or interlock with the concrete body.

Such strips are economically produced by simple machinery, and may therefore be sold at a moderate price.

The characteristics and. advantages of the invention are further sufiiciently explained in connection with the following detail description of the accompanying drawings, which illustrates certain representative embodiments. After considering these examples, skilled persons will understand that many variations may be made without departing from the principles of the invention, and I contemplate the employment of any structures that are properly within the scope of the appended claims.

F ig. 1 is a perspective view of a terrazzo strip embodying the invention inone form.

Fig. 2 is a transverse section, showing the strip in place in a floor structure.

Fig. 3 is a similar view, showing the use of a securing nail, in cooperation with one of the strip-eyes.

Fig. 4 is a side elevation, showing a supplemental bonding device, or staple, in cooperation with one of the strip-eyes or loops.

Fig. 5 is a top plan of a modified strip.

The strip 1 of any suitable metal (such as brass, bronze, etc.) has thereon at suitablyspaced intervals, interlocking or bonding formations 2, sometimes identifiedas loops or eyes. Preferably these are formed of tongues punched out of the integral metal of the strip, leaving a slot- 3 therein, providing for cross-bonding of the floor material through these slots. The tongues are bent or curled to loop or ring form, asshown, with their free ends 4 confronting ,or resting against the face of the main strip. Desirably two tongues are punched from the same slot 3 and bent back oppositely to form the eyes 2; otherwise a single tongue may be made, connected at one end of the slot to the main strip, and rolled back to approximately the shape shown. The ring formations may project at only one side of the strip, as in Fig. 1, or when desired they may project laterally from 0pposite sides of the strip, as shown in Fig. 5. In either case after the concrete has set, portions of it passing through the openings of the rings and also engaging in the undercut formations provided by the sides of the rings, adjacent the strip faces, prevent the strip from pulling alternately away from the concrete body; and when the rings are formed on both sides of the strip, this positive interlock between the strip and the concrete blocks prevents any separation of adjacent blocks such as frequently occurs in ordinary terrazzo work.

Additional apertures such as 5 may be punched in the strip, intermediate slots 3, to lighten the strip, to act as an anchor, and at the same time to produce valuable scrap material.

Usually the additional apertures such as 5 are located in the part of the strip which is lowermost when placed in operative position.

Fig. 2 shows the strip properly inserted in a terrazzo floor. The strip is pushed down into the lower layer, or under body 6, which is a suitable concrete mixture, while this material is lastic, the proper location being determined by the upper faces of the loops 2,

which are flush with the upper surface of this under body 6. After the latter has set, the top, or finishing layer 7 of any suitable material, such as marble fragments and cement, is poured and leveled, flush with the upper edges of the strips, which are arranged in any desired pattern. The plastic floor material flows intoall apertures of the strip, including the interior-spaces of the eyes or loops 2, the slots 3 and apertures 5, thus forming cross-bonds of the integral floor material through these slots and apertures, and the loops 2 are thus also firmly interlocked with the plastic.

The loops or other bonding formations evidently prevent slipping or movement of the strip longitudinally or vertically, and produce a terrazzo structure which is exceptionally strong and durable and free from cracking or separation of the blocks along the lines of the strips.

\Vhen desired, the strips may be held firmly in place, secured against accidental dis placement until all the strips are located and the upper layer 7 is poured, by nails such as .8, Fig. 3, driven through any one or more of the bond-loops 2 and into an under-base such as the wood floor 9, upon which the terrazzo structure is laid. i

Also in some cases, originally separate bonding devices such as 10- may be applied to the stips 1, in cooperation with their loop formations 2. These devices may be as shown, practically in the form of staples, made of strips of suitable sheet metal, such as scrap pieces punched from the main strips in proc- (ass of manufacture. These staples include heads 11 and shanks 12 passing through eyes 2 and secured by bending them divergently,

as shown in Fig. 4;. These staples or equivalent devices form an additional secure bond in the plastic floor material.

The bonding formations such as the loops 2 or thestaple devices 10 serve to retain the strip in position while the concrete is setting and thereafter form a secure bond with the hardened concrete, as sufficiently explained above.

I claim 1. A terrazzo strip, having thereon a. plurality of spaced bonding devices of substantially loop-form, and projecting from one side of the strip, the central axis of the opening of each loop-form device extending substantially at right angles to the longitudinal edges of the strip, whereby when in use such central axes are positioned substantially vertical.

2. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting from one side of the strip,.said loop-formations consisting of integral tongues punched from the strip and rolled to stated form, the punched tongues leaving in the main strip slots for cross-bonding of the plast1c floor material.

3. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projectlng from one side of the strip, said loop-formations consisting of integral tongues punched from the strip and rolled in opposite directions to stated loop form.

4. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting from one side of the strip, the loop shaped bonding formations providing means for insertion of nails to retain the strip in position.

5. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting from one side of the strip, the looped bonding formations providing means for insertion of additional, originally-separate bonding devices.

6. A metal terrazzo strip, having thereon a plurality of integral, spaced bOIIdIII formations, of substantially loop-form, the loopformations consisting of tongues punched from the strip and rolled to stated form, with their free ends located adjacent a solid face of the strip. j

7. A terrazzo floor structure comprising plastic material and a terrazzo strip imbedded therein, the strip having loopedbonding formations, and originally-separate bonding devices of substantially staple form and including bendable prongs inserted through said looped formations and secured therein by divergent bonding of the prongs.

8. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting alternately from opposite sides of the strip, said loopformations consistin of integral tongues punched from the strip and rolled to stated form, the punched tongues leaving in the main strip slots for cross-bonding of the plastic floor material.

9. A terrazzo strip,

having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting from one side of the strip, said loop-formations consisting of integral tongues punched from the strip and rolled to stated form, the punched tongues leaving in the main strip slots for cross-bonding of the plastic floor material, said bonding devices forming firm interlocks with the terrazzo block structure and preventing separation of the blocks and relative movement of the strip.

10. A terrazzo stri having thereon a plurality-of spaced bon ing devices of substantially loop-form, and projectin from both sides of the strip, said bonding evices forming firm interlocks with the terrazzo block structure and preventingseparation of the blocks and relative movement of the strip.

11. A terrazzo strip, having thereon a plurality of spaced bonding devices of substantially loop-form, and projecting from both sides of the strip, said loop-formations consisting of integral tongues punched from the strip and rolled to stated form, said bond,- ing' devices forming firm interlocks with the terrazzo block structure and preventing separation of the blocks and relative movement of the strip.

12. A terrazzo strip having a plurality of spaced bonding devices comprising integral tongues punched from the strip and bent into the form of a loop away from the plane of the strip along a line substantially at right angles to the longitudinal axis of the strip. a

In testimony whereof I have signed this specification this 5th day of October, 1928.

GEORGE P. GRANELL. 

